| -- |
| -- Licensed to the Apache Software Foundation (ASF) under one or more |
| -- contributor license agreements. See the NOTICE file distributed with |
| -- this work for additional information regarding copyright ownership. |
| -- The ASF licenses this file to You under the Apache License, Version 2.0 |
| -- (the "License"); you may not use this file except in compliance with |
| -- the License. You may obtain a copy of the License at |
| -- |
| -- http://www.apache.org/licenses/LICENSE-2.0 |
| -- |
| -- Unless required by applicable law or agreed to in writing, software |
| -- distributed under the License is distributed on an "AS IS" BASIS, |
| -- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| -- See the License for the specific language governing permissions and |
| -- limitations under the License. |
| -- |
| local Const = require('skywalking.constants') |
| |
| |
| local SEGMENT_BATCH_COUNT = 100 |
| |
| local Client = { |
| -- expose the delay for test |
| backendTimerDelay = 3 -- in seconds |
| } |
| |
| -- Tracing timer reports instance properties report, keeps alive and sends traces |
| -- After report instance properties successfully, it sends keep alive packages. |
| function Client:startBackendTimer(backend_http_uri) |
| local metadata_buffer = ngx.shared.tracing_buffer |
| |
| -- The codes of timer setup is following the OpenResty timer doc |
| local new_timer = ngx.timer.at |
| local check |
| |
| local log = ngx.log |
| local DEBUG = ngx.DEBUG |
| local ERR = ngx.ERR |
| |
| check = function(premature) |
| if not premature and not self.stopped then |
| local instancePropertiesSubmitted = metadata_buffer:get('instancePropertiesSubmitted') |
| if (instancePropertiesSubmitted == nil or instancePropertiesSubmitted == false) then |
| self:reportServiceInstance(metadata_buffer, backend_http_uri) |
| else |
| self:ping(metadata_buffer, backend_http_uri) |
| end |
| |
| self:reportTraces(metadata_buffer, backend_http_uri) |
| |
| -- do the health check |
| local ok, err = new_timer(self.backendTimerDelay, check) |
| if not ok then |
| log(ERR, "failed to create timer: ", err) |
| return |
| end |
| end |
| end |
| |
| if 0 == ngx.worker.id() then |
| local ok, err = new_timer(self.backendTimerDelay, check) |
| if not ok then |
| log(ERR, "failed to create timer: ", err) |
| return |
| end |
| end |
| end |
| |
| -- Stop the tracing report timer and clean unreported data |
| function Client:destoryBackendTimer() |
| self.stopped = true |
| |
| local metadata_buffer = ngx.shared.tracing_buffer |
| local ok, err = metadata_buffer:delete(Const.segment_queue) |
| if not ok then |
| return nil, err |
| end |
| |
| return true |
| end |
| |
| function Client:reportServiceInstance(metadata_buffer, backend_http_uri) |
| local log = ngx.log |
| local DEBUG = ngx.DEBUG |
| local ERR = ngx.ERR |
| |
| local serviceName = metadata_buffer:get('serviceName') |
| local serviceInstanceName = metadata_buffer:get('serviceInstanceName') |
| |
| local cjson = require('cjson') |
| local reportInstance = require("skywalking.management").newReportInstanceProperties(serviceName, serviceInstanceName) |
| local reportInstanceParam, err = cjson.encode(reportInstance) |
| if err then |
| log(ERR, "Request to report instance fails, ", err) |
| return |
| end |
| |
| local http = require('resty.http') |
| local httpc = http.new() |
| local res, err = httpc:request_uri(backend_http_uri .. '/v3/management/reportProperties', { |
| method = "POST", |
| body = reportInstanceParam, |
| headers = { |
| ["Content-Type"] = "application/json", |
| }, |
| }) |
| |
| if not res then |
| log(ERR, "Instance report fails, ", err) |
| elseif res.status == 200 then |
| log(DEBUG, "Instance report response = ", res.body) |
| metadata_buffer:set('instancePropertiesSubmitted', true) |
| else |
| log(ERR, "Instance report fails, response code ", res.status) |
| end |
| end |
| |
| -- Ping the backend to update instance heartheat |
| function Client:ping(metadata_buffer, backend_http_uri) |
| local log = ngx.log |
| local DEBUG = ngx.DEBUG |
| local ERR = ngx.ERR |
| |
| local serviceName = metadata_buffer:get('serviceName') |
| local serviceInstanceName = metadata_buffer:get('serviceInstanceName') |
| |
| local cjson = require('cjson') |
| local pingPkg = require("skywalking.management").newServiceInstancePingPkg(serviceName, serviceInstanceName) |
| local pingPkgParam, err = cjson.encode(pingPkg) |
| if err then |
| log(ERR, "Agent ping fails, ", err) |
| end |
| |
| local http = require('resty.http') |
| local httpc = http.new() |
| local res, err = httpc:request_uri(backend_http_uri .. '/v3/management/keepAlive', { |
| method = "POST", |
| body = pingPkgParam, |
| headers = { |
| ["Content-Type"] = "application/json", |
| }, |
| }) |
| |
| if err == nil then |
| if res.status ~= 200 then |
| log(ERR, "Agent ping fails, response code ", res.status) |
| end |
| else |
| log(ERR, "Agent ping fails, ", err) |
| end |
| end |
| |
| -- Send segemnts data to backend |
| local function sendSegments(segmentTransform, backend_http_uri) |
| local log = ngx.log |
| local DEBUG = ngx.DEBUG |
| local ERR = ngx.ERR |
| |
| local http = require('resty.http') |
| local httpc = http.new() |
| |
| local res, err = httpc:request_uri(backend_http_uri .. '/v3/segments', { |
| method = "POST", |
| body = segmentTransform, |
| headers = { |
| ["Content-Type"] = "application/json", |
| }, |
| }) |
| |
| if err == nil then |
| if res.status ~= 200 then |
| log(ERR, "Segment report fails, response code ", res.status) |
| return false |
| end |
| else |
| log(ERR, "Segment report fails, ", err) |
| return false |
| end |
| |
| return true |
| end |
| |
| -- Report trace segments to the backend |
| function Client:reportTraces(metadata_buffer, backend_http_uri) |
| local log = ngx.log |
| local DEBUG = ngx.DEBUG |
| local ERR = ngx.ERR |
| |
| local queue = ngx.shared.tracing_buffer |
| local segment = queue:rpop(Const.segment_queue) |
| local segmentTransform = '' |
| |
| local count = 0 |
| local totalCount = 0 |
| |
| while segment ~= nil |
| do |
| if #segmentTransform > 0 then |
| segmentTransform = segmentTransform .. ',' |
| end |
| |
| segmentTransform = segmentTransform .. segment |
| segment = queue:rpop(Const.segment_queue) |
| count = count + 1 |
| |
| if count >= SEGMENT_BATCH_COUNT then |
| if sendSegments('[' .. segmentTransform .. ']', backend_http_uri) then |
| totalCount = totalCount + count |
| end |
| |
| segmentTransform = '' |
| count = 0 |
| end |
| end |
| |
| if #segmentTransform > 0 then |
| if sendSegments('[' .. segmentTransform .. ']', backend_http_uri) then |
| totalCount = totalCount + count |
| end |
| end |
| |
| if totalCount > 0 then |
| log(DEBUG, totalCount, " segments reported.") |
| end |
| end |
| |
| return Client |